diff --git a/Documentation/devicetree/bindings/btmrvl.txt b/Documentation/devicetree/bindings/btmrvl.txt
new file mode 100644
index 000000000000..58f964bb0a52
--- /dev/null
+++ b/Documentation/devicetree/bindings/btmrvl.txt
@@ -0,0 +1,29 @@
+btmrvl
+------
+
+Required properties:
+
+  - compatible : must be "btmrvl,cfgdata"
+
+Optional properties:
+
+  - btmrvl,cal-data : Calibration data downloaded to the device during
+		      initialization. This is an array of 28 values(u8).
+
+  - btmrvl,gpio-gap : gpio and gap (in msecs) combination to be
+		      configured.
+
+Example:
+
+GPIO pin 13 is configured as a wakeup source and GAP is set to 100 msecs
+in below example.
+
+btmrvl {
+	compatible = "btmrvl,cfgdata";
+
+	btmrvl,cal-data = /bits/ 8 <
+		0x37 0x01 0x1c 0x00 0xff 0xff 0xff 0xff 0x01 0x7f 0x04 0x02
+		0x00 0x00 0xba 0xce 0xc0 0xc6 0x2d 0x00 0x00 0x00 0x00 0x00
+		0x00 0x00 0xf0 0x00>;
+	btmrvl,gpio-gap = <0x0d64>;
+};
diff --git a/drivers/bluetooth/ath3k.c b/drivers/bluetooth/ath3k.c
index 25c874da5f2b..fce758896280 100644
--- a/drivers/bluetooth/ath3k.c
+++ b/drivers/bluetooth/ath3k.c
@@ -106,6 +106,7 @@ static const struct usb_device_id ath3k_table[] = {
 	{ USB_DEVICE(0x13d3, 0x3375) },
 	{ USB_DEVICE(0x13d3, 0x3393) },
 	{ USB_DEVICE(0x13d3, 0x3402) },
+	{ USB_DEVICE(0x13d3, 0x3408) },
 	{ USB_DEVICE(0x13d3, 0x3432) },
 
 	/* Atheros AR5BBU12 with sflash firmware */
@@ -158,6 +159,7 @@ static const struct usb_device_id ath3k_blist_tbl[] = {
 	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
+	{ USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
 
 	/* Atheros AR5BBU22 with sflash firmware */
diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c
index 1d7db2064889..bb0d2c26a479 100644
--- a/drivers/bluetooth/btmrvl_main.c
+++ b/drivers/bluetooth/btmrvl_main.c
@@ -41,6 +41,11 @@ void btmrvl_interrupt(struct btmrvl_private *priv)
 
 	priv->adapter->int_count++;
 
+	if (priv->adapter->hs_state == HS_ACTIVATED) {
+		BT_DBG("BT: HS DEACTIVATED in ISR!\n");
+		priv->adapter->hs_state = HS_DEACTIVATED;
+	}
+
 	wake_up_interruptible(&priv->main_thread.wait_q);
 }
 EXPORT_SYMBOL_GPL(btmrvl_interrupt);
@@ -323,6 +328,7 @@ int btmrvl_prepare_command(struct btmrvl_private *priv)
 		} else {
 			ret = priv->hw_wakeup_firmware(priv);
 			priv->adapter->hs_state = HS_DEACTIVATED;
+			BT_DBG("BT: HS DEACTIVATED due to host activity!\n");
 		}
 	}
 
@@ -492,29 +498,31 @@ static int btmrvl_download_cal_data(struct btmrvl_private *priv,
 	return 0;
 }
 
-static int btmrvl_cal_data_dt(struct btmrvl_private *priv)
+static int btmrvl_check_device_tree(struct btmrvl_private *priv)
 {
 	struct device_node *dt_node;
 	u8 cal_data[BT_CAL_HDR_LEN + BT_CAL_DATA_SIZE];
-	const char name[] = "btmrvl_caldata";
-	const char property[] = "btmrvl,caldata";
 	int ret;
+	u32 val;
 
-	dt_node = of_find_node_by_name(NULL, name);
-	if (!dt_node)
-		return -ENODEV;
+	for_each_compatible_node(dt_node, NULL, "btmrvl,cfgdata") {
+		ret = of_property_read_u32(dt_node, "btmrvl,gpio-gap", &val);
+		if (!ret)
+			priv->btmrvl_dev.gpio_gap = val;
 
-	ret = of_property_read_u8_array(dt_node, property,
-					cal_data + BT_CAL_HDR_LEN,
-					BT_CAL_DATA_SIZE);
-	if (ret)
-		return ret;
+		ret = of_property_read_u8_array(dt_node, "btmrvl,cal-data",
+						cal_data + BT_CAL_HDR_LEN,
+						BT_CAL_DATA_SIZE);
+		if (ret)
+			return ret;
 
-	BT_DBG("Use cal data from device tree");
-	ret = btmrvl_download_cal_data(priv, cal_data, BT_CAL_DATA_SIZE);
-	if (ret) {
-		BT_ERR("Fail to download calibrate data");
-		return ret;
+		BT_DBG("Use cal data from device tree");
+		ret = btmrvl_download_cal_data(priv, cal_data,
+					       BT_CAL_DATA_SIZE);
+		if (ret) {
+			BT_ERR("Fail to download calibrate data");
+			return ret;
+		}
 	}
 
 	return 0;
@@ -526,14 +534,15 @@ static int btmrvl_setup(struct hci_dev *hdev)
 
 	btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
 
-	btmrvl_cal_data_dt(priv);
+	priv->btmrvl_dev.gpio_gap = 0xffff;
+
+	btmrvl_check_device_tree(priv);
 
 	btmrvl_pscan_window_reporting(priv, 0x01);
 
 	priv->btmrvl_dev.psmode = 1;
 	btmrvl_enable_ps(priv);
 
-	priv->btmrvl_dev.gpio_gap = 0xffff;
 	btmrvl_send_hscfg_cmd(priv);
 
 	return 0;
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 7c13d7a8d83c..9efdace85e15 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -185,6 +185,7 @@ static const struct usb_device_id blacklist_table[] = {
 	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
+	{ USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
 
 	/* Atheros AR5BBU12 with sflash firmware */
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index a805b3d97c0b..396c09840fdf 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -130,6 +130,7 @@ struct smp_irk {
 
 struct link_key {
 	struct list_head list;
+	struct rcu_head rcu;
 	bdaddr_t bdaddr;
 	u8 type;
 	u8 val[HCI_LINK_KEY_SIZE];
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index d786958a1dec..5c319a49a5a4 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -274,15 +274,13 @@ static const struct file_operations inquiry_cache_fops = {
 static int link_keys_show(struct seq_file *f, void *ptr)
 {
 	struct hci_dev *hdev = f->private;
-	struct list_head *p, *n;
+	struct link_key *key;
 
-	hci_dev_lock(hdev);
-	list_for_each_safe(p, n, &hdev->link_keys) {
-		struct link_key *key = list_entry(p, struct link_key, list);
+	rcu_read_lock();
+	list_for_each_entry_rcu(key, &hdev->link_keys, list)
 		seq_printf(f, "%pMR %u %*phN %u\n", &key->bdaddr, key->type,
 			   HCI_LINK_KEY_SIZE, key->val, key->pin_len);
-	}
-	hci_dev_unlock(hdev);
+	rcu_read_unlock();
 
 	return 0;
 }
@@ -1128,6 +1126,7 @@ struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
 	err = hci_req_run(&req, hci_req_sync_complete);
 	if (err < 0) {
 		remove_wait_queue(&hdev->req_wait_q, &wait);
+		set_current_state(TASK_RUNNING);
 		return ERR_PTR(err);
 	}
 
@@ -1196,6 +1195,7 @@ static int __hci_req_sync(struct hci_dev *hdev,
 		hdev->req_status = 0;
 
 		remove_wait_queue(&hdev->req_wait_q, &wait);
+		set_current_state(TASK_RUNNING);
 
 		/* ENODATA means the HCI request command queue is empty.
 		 * This can happen when a request with conditionals doesn't
@@ -3099,15 +3099,11 @@ void hci_uuids_clear(struct hci_dev *hdev)
 
 void hci_link_keys_clear(struct hci_dev *hdev)
 {
-	struct list_head *p, *n;
+	struct link_key *key;
 
-	list_for_each_safe(p, n, &hdev->link_keys) {
-		struct link_key *key;
-
-		key = list_entry(p, struct link_key, list);
-
-		list_del(p);
-		kfree(key);
+	list_for_each_entry_rcu(key, &hdev->link_keys, list) {
+		list_del_rcu(&key->list);
+		kfree_rcu(key, rcu);
 	}
 }
 
@@ -3135,9 +3131,14 @@ struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
 {
 	struct link_key *k;
 
-	list_for_each_entry(k, &hdev->link_keys, list)
-		if (bacmp(bdaddr, &k->bdaddr) == 0)
+	rcu_read_lock();
+	list_for_each_entry_rcu(k, &hdev->link_keys, list) {
+		if (bacmp(bdaddr, &k->bdaddr) == 0) {
+			rcu_read_unlock();
 			return k;
+		}
+	}
+	rcu_read_unlock();
 
 	return NULL;
 }
@@ -3288,7 +3289,7 @@ struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
 		key = kzalloc(sizeof(*key), GFP_KERNEL);
 		if (!key)
 			return NULL;
-		list_add(&key->list, &hdev->link_keys);
+		list_add_rcu(&key->list, &hdev->link_keys);
 	}
 
 	BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
@@ -3381,8 +3382,8 @@ int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
 
 	BT_DBG("%s removing %pMR", hdev->name, bdaddr);
 
-	list_del(&key->list);
-	kfree(key);
+	list_del_rcu(&key->list);
+	kfree_rcu(key, rcu);
 
 	return 0;
 }
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 844f7d1ff1cd..bd0a80120665 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3191,6 +3191,38 @@ unlock:
 	hci_dev_unlock(hdev);
 }
 
+static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
+{
+	if (key_type == HCI_LK_CHANGED_COMBINATION)
+		return;
+
+	conn->pin_length = pin_len;
+	conn->key_type = key_type;
+
+	switch (key_type) {
+	case HCI_LK_LOCAL_UNIT:
+	case HCI_LK_REMOTE_UNIT:
+	case HCI_LK_DEBUG_COMBINATION:
+		return;
+	case HCI_LK_COMBINATION:
+		if (pin_len == 16)
+			conn->pending_sec_level = BT_SECURITY_HIGH;
+		else
+			conn->pending_sec_level = BT_SECURITY_MEDIUM;
+		break;
+	case HCI_LK_UNAUTH_COMBINATION_P192:
+	case HCI_LK_UNAUTH_COMBINATION_P256:
+		conn->pending_sec_level = BT_SECURITY_MEDIUM;
+		break;
+	case HCI_LK_AUTH_COMBINATION_P192:
+		conn->pending_sec_level = BT_SECURITY_HIGH;
+		break;
+	case HCI_LK_AUTH_COMBINATION_P256:
+		conn->pending_sec_level = BT_SECURITY_FIPS;
+		break;
+	}
+}
+
 static void hci_link_key_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
 {
 	struct hci_ev_link_key_req *ev = (void *) skb->data;
@@ -3232,8 +3264,7 @@ static void hci_link_key_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
 			goto not_found;
 		}
 
-		conn->key_type = key->type;
-		conn->pin_length = key->pin_len;
+		conn_set_key(conn, key->type, key->pin_len);
 	}
 
 	bacpy(&cp.bdaddr, &ev->bdaddr);
@@ -3266,12 +3297,8 @@ static void hci_link_key_notify_evt(struct hci_dev *hdev, struct sk_buff *skb)
 	if (conn) {
 		hci_conn_hold(conn);
 		conn->disc_timeout = HCI_DISCONN_TIMEOUT;
-		pin_len = conn->pin_length;
-
-		if (ev->key_type != HCI_LK_CHANGED_COMBINATION)
-			conn->key_type = ev->key_type;
-
 		hci_conn_drop(conn);
+		conn_set_key(conn, ev->key_type, conn->pin_length);
 	}
 
 	if (!test_bit(HCI_MGMT, &hdev->dev_flags))
@@ -3282,6 +3309,12 @@ static void hci_link_key_notify_evt(struct hci_dev *hdev, struct sk_buff *skb)
 	if (!key)
 		goto unlock;
 
+	/* Update connection information since adding the key will have
+	 * fixed up the type in the case of changed combination keys.
+	 */
+	if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
+		conn_set_key(conn, key->type, key->pin_len);
+
 	mgmt_new_link_key(hdev, key, persistent);
 
 	/* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
@@ -3291,8 +3324,8 @@ static void hci_link_key_notify_evt(struct hci_dev *hdev, struct sk_buff *skb)
 	 */
 	if (key->type == HCI_LK_DEBUG_COMBINATION &&
 	    !test_bit(HCI_KEEP_DEBUG_KEYS, &hdev->dev_flags)) {
-		list_del(&key->list);
-		kfree(key);
+		list_del_rcu(&key->list);
+		kfree_rcu(key, rcu);
 	} else if (conn) {
 		if (persistent)
 			clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 8e1273173020..c2d1489c228c 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -840,7 +840,10 @@ static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len,
 	if (!skb)
 		return;
 
-	if (lmp_no_flush_capable(conn->hcon->hdev))
+	/* Use NO_FLUSH if supported or we have an LE link (which does
+	 * not support auto-flushing packets) */
+	if (lmp_no_flush_capable(conn->hcon->hdev) ||
+	    conn->hcon->type == LE_LINK)
 		flags = ACL_START_NO_FLUSH;
 	else
 		flags = ACL_START;
@@ -874,8 +877,13 @@ static void l2cap_do_send(struct l2cap_chan *chan, struct sk_buff *skb)
 		return;
 	}
 
-	if (!test_bit(FLAG_FLUSHABLE, &chan->flags) &&
-	    lmp_no_flush_capable(hcon->hdev))
+	/* Use NO_FLUSH for LE links (where this is the only option) or
+	 * if the BR/EDR link supports it and flushing has not been
+	 * explicitly requested (through FLAG_FLUSHABLE).
+	 */
+	if (hcon->type == LE_LINK ||
+	    (!test_bit(FLAG_FLUSHABLE, &chan->flags) &&
+	     lmp_no_flush_capable(hcon->hdev)))
 		flags = ACL_START_NO_FLUSH;
 	else
 		flags = ACL_START;
diff --git a/net/ieee802154/6lowpan_rtnl.c b/net/ieee802154/6lowpan_rtnl.c
index 290e14f2e92e..16f5e91bd390 100644
--- a/net/ieee802154/6lowpan_rtnl.c
+++ b/net/ieee802154/6lowpan_rtnl.c
@@ -597,7 +597,7 @@ static int lowpan_newlink(struct net *src_net, struct net_device *dev,
 
 	entry->ldev = dev;
 
-	/* Set the lowpan harware address to the wpan hardware address. */
+	/* Set the lowpan hardware address to the wpan hardware address. */
 	memcpy(dev->dev_addr, real_dev->dev_addr, IEEE802154_ADDR_LEN);
 
 	mutex_lock(&lowpan_dev_info(dev)->dev_list_mtx);
diff --git a/net/ieee802154/netlink.c b/net/ieee802154/netlink.c
index 63ee7d66950e..6ad0da38ba9d 100644
--- a/net/ieee802154/netlink.c
+++ b/net/ieee802154/netlink.c
@@ -1,5 +1,5 @@
 /*
- * Netlink inteface for IEEE 802.15.4 stack
+ * Netlink interface for IEEE 802.15.4 stack
  *
  * Copyright 2007, 2008 Siemens AG
  *
diff --git a/net/ieee802154/nl-mac.c b/net/ieee802154/nl-mac.c
index fe77f0c770b8..1f085ed944d2 100644
--- a/net/ieee802154/nl-mac.c
+++ b/net/ieee802154/nl-mac.c
@@ -1,5 +1,5 @@
 /*
- * Netlink inteface for IEEE 802.15.4 stack
+ * Netlink interface for IEEE 802.15.4 stack
  *
  * Copyright 2007, 2008 Siemens AG
  *
diff --git a/net/ieee802154/nl-phy.c b/net/ieee802154/nl-phy.c
index 80a946dddd90..62463544d056 100644
--- a/net/ieee802154/nl-phy.c
+++ b/net/ieee802154/nl-phy.c
@@ -1,5 +1,5 @@
 /*
- * Netlink inteface for IEEE 802.15.4 stack
+ * Netlink interface for IEEE 802.15.4 stack
  *
  * Copyright 2007, 2008 Siemens AG
  *
diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c
index 38dfc72d24b6..9ae893057dd7 100644
--- a/net/mac802154/iface.c
+++ b/net/mac802154/iface.c
@@ -510,11 +510,9 @@ ieee802154_if_add(struct ieee802154_local *local, const char *name,
 	if (ret)
 		goto err;
 
-	if (ndev) {
-		ret = register_netdevice(ndev);
-		if (ret < 0)
-			goto err;
-	}
+	ret = register_netdevice(ndev);
+	if (ret < 0)
+		goto err;
 
 	mutex_lock(&local->iflist_mtx);
 	list_add_tail_rcu(&sdata->list, &local->interfaces);